$ratio:375/10;
@function px2rem($px){
    @return $px/$ratio+rem;
}

@mixin center {
    display: flex;
    align-items: center;
    justify-content: center;
}

@mixin left {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

@mixin right {
    display: flex;
    align-items: flex-end;
    justify-content: center;
}